Ueshima RTM Friction Tester (MODEL FR-7225)


RTM Friction Tester enables to evaluate friction characteristics of tire tread compound in Dry, Wet and Ice conditions. Friction coefficient over slip ratio (μ-S curve) can be plotted in a single test by sweeping the slip ratio.

RTM Friction Tester enables to evaluate friction characteristics of tire tread compound on material testing basis, and can be tested in Dry, Wet, Ice conditions on ring shaped road surface. Test is performed by pressing specimen on constantly rotating ring shaped wheel at free rolling condition, or with slip ratio applied in 0 to +/- 95% range and measuring the friction force. Also, max. 30deg. slip angle can be applied on the specimen against it’s tangential line.


  • Traction (Acceleration, Braking)Measurement
  • Rolling Resistance Measurement
  • Cornering Force Measurement


  • Friction test at Dry, Wet, Ice conditions can be performed with one equipment.
  • Traction (Acceleration, Braking) test changing slip ratio during 1 test can be performed.
  • Friction force(Rolling Resistance) Measurement at free rolling condition can be performed.
  • Max. 30deg. slip angle can be applied between sample and test road. (Automatic setting)
  • Specimen taken from actual tire tread can be glued on the sample for testing.
  • Chamber and water temperature can be controlled individually.
  • Ice road surface can be made in the test chamber.

Test Conditions

  • Road condition (Dry, Wet, Ice)
  • Slip ratio (road based)
  • Load
  • Speed
  • Temperature chamber, water temperature

Software Functions

  • Test condition setup and test start command
  • Making a µ-S curve by data acquisition
  • Making a Torque-Time curve by a free-rolling test
  • Making a Fy-Time curve by a free-rolling test
  • Making a µ-Time curve in a constant slip ratio test

RTM Friction Tester FR-7225


RTM Friction Tester FR-7225 μ-S Curve Same Compound

μ-S Curve (Same Compound)

RTM Friction Tester FR-7225 μ-S test set screen

μ-S test set screen

RTM Friction Tester FR-7225 Free rolling set screen

Free rolling set screen

RTM Friction Tester FR-7225 μ-S Curve Different Compounds

μ-S Curve (Different Compounds)

RTM Friction Tester FR-7225 Pre-test screen

Pre-test screen

RTM Friction Tester FR-7225 Smoothing screen

Smoothing screen


NameRTM Friction Tester
SampleColumnar shape   Dia.80mm, W16mm
Sheet shape   W10mm x L300mm x T2mm(to glue actual tread on to test sample)
RoadThickness: 30mm, Width: 50mm, dia. of the road center: 700mm (outer dia.: 750mm)
Road surfaceSafety walk, Ice
Road speed4 – 400r/min (Approx. 0.5 – 50km/h)
Sample speed35 – 3500r/min (Approx. 0.5 – 50km/h)
Torque detection30Nm capacity torque meter(Dry/Wet), 3Nm(Ice), measurement error:±1%FS
Torque meter to be replaced depending on test condition
Slip angle±30deg. against road surface tangential line (automatic setting)
Slip ratio0〜±95% automatic setting (25km/h max. for negative slip ratio)
Load detectionLoad cell capacity 200N, measurement accuracy: ±1%FS
Lateral force detection100N capacity load cell (Dry/Wet), 50N(Ice), Accuracy±1%FS
Load cell to be replaced depending on test condition
Loading partFeedback control with air servo with the load range of 20 – 150N±1%FS
Test chamber temp.−10℃〜60℃±2℃
Road temp.No temperature control (Surface temperature is monitored.)
Water temp.5℃〜40℃(around the valve)for Wet
Surface temp.Measured with non-contact surface temperature sensor
Refrigerationwith defrosting device(Temperature changes when defrosting)
Compressed air0.5MPa – 0.8MPa dry clean air, to be connected with φ8 one-touch connector
Power supply3 Phs. 200V 75A 50Hz/60Hz  terminal connection
WaterTap water (15A): 2L/min (for Wet/Ice),
Chiller water for refrigerator (20A):30L/min(25°C or below)
Road drain(32A), Chiller water drain(20A)
Service Condition(1)Temp: 5 – 40℃
(2)Humidity: 35 – 80%RH
Dimensions, WeightDimensions 1400(W)×1800(D)×1760(H)mm,
Weight Approx 1,400kg

Ueshima RTM Friction Tester (MODEL FR-7225): Representatives

Seika Machinery Inc Los Angeles Head Office & Demo Center

21241 S. Western Ave.
Suite 140
Torrance, CA 90501 USA
Driving Directions
(310) 540-7310
(310) 540-7930

Seika Machinery Inc Atlanta Branch Office & Demo Center

1580 Boggs Rd.,
Suite 900
Duluth, GA 30096 USA
Driving Directions
(770) 446-3116
(770) 446-3118

Seika Machinery Inc San Francisco Branch Office

23785 Cabot Blvd.
Suite 306
Hayward, CA 94545 USA
Driving Directions
(510) 293-0580
(510) 293-0940
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